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Finding the Fourth Proportional to 660,989.33, 912,083.66 and 402,772.20

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Solution

The fourth proportional to 660,989.33, 912,083.66 and 402,772.20 is: 555,775.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,989.33 : 912,083.66 = 402,772.20 : x
  2. Step 2: Convert to fraction form
    660,989.33/912,083.66 = 402,772.20/x
  3. Step 3: Cross multiply
    660,989.33x = 912,083.66 × 402,772.20
  4. Step 4: Simplify right side
    660,989.33x = 367,361,938,398.47
  5. Step 5: Solve for x
    x = 367,361,938,398.47/660,989.33
  6. Step 6: Final answer
    x = 555,775.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.